Effect of ambient PM_2.5 on cerebrovascular mortality in the population of Changzhou city

Objective To explore the effect of fine particulate matter(PM_2.5) on cerebrovascular mortality in Changzhou, Jiangsu Province, China.

Methods The data of daily major ambient pollutants concentration, meteorological factors and the death cases of residents from January 1, 2015 to December 31, 2018 were collected in Changzhou. The generalized additive model(GAM) was conducted to analysis the effects of PM_2.5 on cerebrovascular mortality.

Results From 2015 to 2018, the average concentration of ambient PM_2.5 in Changzhou was 50.1 μg/m³. The exceeding standard days of PM_2.5 mass concentration accounted for 15.7%(230/1 461). When the ambient PM_2.5 concentration (lag3 d) increased 10 μg/m³, the daily deaths of cerebrovascular disease in the whole population and in the male population increased by 0.56%(95%CI: 0.04% - 1.08%) and 0.79%(95%CI: 0.07% - 1.52%), respectively, and the daily deaths of cerebrovascular disease in the population aged 65 or older and in the male population aged 65 or older increased by 0.63%(95%CI: 0.09% - 1.18%) and 0.95%(95%CI: 0.18% - 1.73%), respectively.

Conclusion Ambient PM_2.5 in Changzhou has an impact on the death of cerebrovascular diseases, significantly increasing the risk of death.